Util Parse multiple UUIDS to string

Not sure where to post this, and not much happening here, but hopefully this basic junk is useful to somebody as I find it works quite well for me when storing and retrieving values from a database... It's just a couple methods that pile a bunch of UUIDs together in one string from an ArrayList, and alternatively create a bunch of UUID objects in an ArrayList from a string... Hopefully it's useful to somebody, it works great for me, fairly basic...

Code:

    private static final char UUID_SEPARATOR = ',';

    protected String uuidListToString(ArrayList<UUID> uuids) {
        StringBuilder uuidList = new StringBuilder();

        boolean firstIteration = true;
        for (UUID currentUuid : uuids) {
            if (firstIteration) {
                uuidList.append(currentUuid.toString());
                firstIteration = false;
            }
            else {
                uuidList.append(UUID_SEPARATOR).append(currentUuid.toString());
            }
        }

        return uuidList.toString();
    }

    public static ArrayList<UUID> uuidListFromString(String string) {
        ArrayList<UUID> uuids = new ArrayList<>();

        if (string != null) {
            char[] stringArray = string.toCharArray();
            String currentUuidString = "";

            for (int i = 0; i < string.length(); i++) {
                if (stringArray[i] != UUID_SEPARATOR) {
                    currentUuidString += stringArray[i];
                } else {
                    try {
                        uuids.add(UUID.fromString(currentUuidString));
                    } catch (IllegalArgumentException e) {
                        YOUR_PLUGIN.getPlugin().getLogger().warning("Could not parse UUID from string");
                    }
                    currentUuidString = "";
                }
            }
        }
        return uuids;
}